Great guide!
I have 27lvl bodyguard and I just love playing with it. Have to say that its getting bit tricky to go on doing solo quest with full heal spec as the mobs just dont go down that well.
Just my point that even though there are other healer classes, they dont have heavy armor on them and we have quite a lot of HP ourselves so imo we can take some really brutal pounding before we go down. I would see that we bodyguards would be kinda ideal partners for main tanks in bigger raids( world bosses etc).